Peter's answer to meemaw's Secondary 3 E Maths Singapore question.
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Let the figure be ABCDE in a clockwise manner with A at 95 degree. It is clear that ACDE is a cyclic quadrilateral. Angle EAC = 180-138= 42. Hence angle BAC = 95-42= 53 and x = 180-53-53= 74. Applying the opposite angle in a cyclic quadrilateral equal to 180 to find y.
Date Posted:
3 years ago
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